Uncaught ReferenceError: require is not defined while integrating VSS.SDK.min.js with SystemJS and amd.min.js

[nerd-at-hyd]

I am getting below errors while integrating VSS.SDK.min.js with SystemJS and amd.min.js

Uncaught ReferenceError: require is not defined
    at <anonymous>:1:1
    at w (VSS.SDK.min.js:2)
    at p (VSS.SDK.min.js:2)

below are the scripts, I have included in my index.html

   <script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
   <script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.1/dist/umd/popper.min.js" integrity="sha384-9/reFTGAW83EW2RDu2S0VKaIzap3H66lZH81PoYlFhbGU+6BZp6G7niu735Sk7lN" crossorigin="anonymous"></script>

   <link rel="preload" href="https://cdnjs.cloudflare.com/ajax/libs/single-spa/5.5.0/system/single-spa.min.js" as="script" crossorigin="anonymous" />
   <script src='https://unpkg.com/core-js-bundle@3.1.4/minified.js'></script>
   <script src="https://unpkg.com/zone.js@0.10.3/dist/zone.js"></script>
   <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/6.8.3/system.min.js"></script>
   <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/6.8.3/extras/amd.min.js"></script>
   <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/4.0.0/extras/named-exports.js"></script>
   <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/4.0.0/extras/named-register.min.js"></script>
   <script src="lib/VSS.SDK.min.js"></script>

Here I don't see this error when I remove amd.min.js

code

VSS.init({
          explicitNotifyLoaded: true,
          usePlatformScripts: true
      });
      VSS.ready(function () {
        VSS.require(["VSS/Authentication/Services"], function (VSS_Auth_Service) {
        });
        VSS.notifyLoadSucceeded();
      });